Centrifugal pump



. May 6, 1930.-

H.' L. KEUN 1,757,670

GENTRIFUGAL PUMP Filed sept. 23, .1927 s sheets-sheet 2 ZZ-@f2 mvENToR H L. Kf'u/v BY 72.! I

ATTORNEY Mays, 1930- H. l.. KEUN f ,1,757,670

GENTRIFUGL PUIP Filed sept.-23, 1927 :s sheets-Sheet 5 ATTORNEY as a.. sa i $1,751.67@

-uNlrEn STATES PATENT o rlflcful HERMAN L. xEUN, -or' cnIcAGo, :immers cnu'rnmuear. PUMPA f Appnoaunmea sptember as, 1927.. serial in. 221,506. My invention relates to improvements in pump having relatively few parts', andthe centrifugal pumps, and it consists in the comparts of which may be easily and quickly as-v binations, constructions, and arrangements sembled or disassembled. 1

herein describedand claimed. Other objects andadvantages vwill appear I 5 An object of my lnventlon'is to provide a 'in the followingl specification, and the novel 55 centrifugal pump in which roller bearings features of the invention will be particularly and lubricating oilfor the bearings may be'pointed out in the appended claims.- V used, and in which means is provided 'for My invention is illustrated in the accomeliminating all possibility of the lubricating panying drawings, forming part of this'apoil coming in contact or mixing with liquid plication, in which 6o passing throu h the pump, v Figure 1 is a central longitudinal sectional A further o ject is to provide a centrifugal view through` my device, v i' pump in which the liquid passing through Figure 2 is a` sectional viewtakenalong the the pump is first passedothrough opposing Ii11e22of Figure 1,

15 ports in a rotor and deflected to a common Figure 3 is a sectional view taken along the 65 center, thus eliminating 'end motion of' the line 3&3 of Figure 2, and l rotor. Y lfigure 4 is a top plan view of the device A further object is to provide a-centrifugal shown in Figure 2.

pump in which the li uid entering the pump In carrying out 'my invention, I providea is fed into the ,eye o the impeller under a casing compri'sin a base portionf l and a 70 positive pressure, thus greatly enhancing the vcover portion 2. he-'base portion 1 and the efficiency of the pump. coverportion 2 are provided with .flanges .3

A further object is to provide-acentrifugl and 4 which are firmly secured together by pump in which the customary pacln'ng is dismeans of bolts 5, Asee Figures -2 and'4.l Referpensed witli,^and in which suitablewea'rfcomvringto Figure 1, it will be observed-thatthe 75 pensating rings are employed so as to make base portion 1 and thecover portion 2 are a' perfect 'liquid -or air-tight device. provided with extended portions 6 and "7.

Afurther object is to provideacentrifugal Suitable roller bearings 8 and -9 ar`e dis- .pump in which a part of the liquid'passing posed within recesses 10 and 11 in the ex- -ao through the pump acts as a cushion for the tendedportions 6 and 7. 80 rotor, thus Veliminating vibration, reducing -ArotorR is mounted forrotation between` friction, and at the same time `using a. part the'bearngs 8 and. 9. 'The rotor in the presof the liquidasa lubricant where it is not deent Instance COIISStS 0f tWO Sections 12 and -sirable to employ lubricating oil. 13. 'An impeller I is formed integral with the A further object is to provide a centrifugal sections 12 and 13, that is, a iange portion14 85 pump in which the impeller unit maybe re is cast integral with the section 13 vand a versed in the housing, thereby changing the flange portion 15-is cast integral with lthe sec-v functionof the device from a centrifugal `tion 12. Vanesl an /17 are cast integral pump to aliquid turbine enginesuitable for withone of the vflanges 14 or 1'5 so that the '40 receivin energylfrom liquid assed through. flanges are held in spaced relation and are 90 g nl;

. -the device under compressio and '-transmit- `firmly riveted together by means of rivets`18,

' tingthe energy derived from such liquid see Figure 2. It will now-,be seen that the un er compression Ito anyV suitable rotor R cousistinglofthe sections-12 andi?, mechanism. and the impellr consisting of the flanges '45 A- further object is to provides. centrifugal 14 and 15 are riveted'or'otherwise secured-tof' 95 umpl in which the rotor revolves in a space ether S0l that the 'IOr A11d the impener? aued'with-liquid and the confinesefwhich orm a unit.. 1 A f converge on two sides to a givenpoint, there- The rotor R fis providedl with a"-reduced @byrreducingcircular `veloc1ty. portion 19 upon which a'cone 20 is mounted.

A further Objectis to providea centrifugal The reduced portion 19 is' provided with 100 threads 21 to receive a nut 22, seeFigure 1. The nut 22 bears against the cone 20, thus holding the roller bearings 9 firmly in place. The extended portions 6 and 7 are provided with an annular recess 23 to receive a flange 24 integral with a protecting cap' 25. Screws 26 passing through the flange 24 firmlyv hold the protecting cap 25 in position. While the protecting cap is primarily for the purpose of protecting the rollerbearings 9 from Referring again to Figure 1, it'will` bc.

noted thatthe section 12 of theV rotor R \is provided with a reduced portion 27 having threads 28't'o .receive a nut 29 which bears against a cone 30 forming. a part of the roller` bearings 8.` A cup 31 bears against ashoulsageways 52 and 53 ass along the sides 54 and 55 forming the out et 50, see Figure 1.` The passageways 52 and 53 are slightly narrowed lThese ports, as will be seen from Figures 1 .and 2, are provided with concave faces 59 having edges '60, adapted to cleave the liquid passing through the ports andforcing it inwardly. It will further be seen that the ports 58 are cut angularly so as to deflect liquid passing therethrough toward the center of the chamber 57, that is, the liquid enteringeach end of the rotor R is deflected to a common center, as will be more fully explained later. s

Referrin to Figure 41,'it will be seen that der 32 the recess 10. Since the cup `fhe sides o the impeller I are -spaced away1 31 bears against the shoulder'32 and the nuL q 29 against the cone 30, it will bey seen that the roller bearings 8 are firmly secured in 0f-"i The base. ortion 1 andthe cover pcrtion place. The extended portions 6 and are provided with a recess 33 within which an oil retaining ring 34 is disposed and held in osition by meansV of screws 35. A sha upon which a suitable driving pulley .or `gear may be mounted is formed integral with the reduced portion 27. u

A .central chamber 37 is provided in the cover-portion 2 and the base 1.- Referring to Figure 2, it will be seen that the centra chamber 37 converges so as to form a relativ'ely narrow space 38 betweenthe walls of the chamber and the rotor R. rllhe purpose of this will be explained later.l Referring now to Figure 1, itwill be noted that I have provided annular grooves 39 in the base portion 1 and the cover portion 2. A sleeve 40 isdisposed within-each of the grooves 39- and is held a ainstmotation by means of pins`41 embedde in the base portion 1 and projectingA into the sleeves. Suitable expanding pistonv type rings 42 are disposed within peripheral grooves 43 which are cut around the rotor 'R-.f The base portion 1 and the cover 'portion 2 are provided with annular .recesses 44 within which sleeves45 are disposed and held against rotation by means of pins 46 sleeves is provided with a groove 49 for the purpose of permitting liquid to pass therethrough and into contact-with the piston type rings 42 which are in contact with the two .sleeves 45? are provi ed with a 4gradually widening 'and roundingoutlet 50, sea Fi gure 2. A liquid inlet 51 is provided`in the base portion 1. The inlet-51 is separated 'to form passageways 5 2 and 53, see Figure 1. The pasf at a point adjacent the shaft 36 to -whichy power is applied. The outlet 50. is provided with flanges 62, see Figures 1 and 2. The flanges 62 protect the-impeller I from frictional contact with the liquid passing through' the outlet thus reducing .to a minimum the friction between the impeller and the 4liquid passing through the outlet 50.

From the foregoing description of the various parts of the' device, the operation thereof may be readilyv understood, n Assuming that the pump has Abeen primed and.

power a lied so that the .rotor R and the s impeller are rotating at the necessary speed,

liquid will be drawn inwardly through the 1n et 51 separating and passing into the passageways 52 and 53 and into the chamber 37 surrounding the rotor R. As theliquid enters the chamber 37, it will be noted from Figure 2 that the converging chamber 37 forces the liquid against the rotor-at points adjacent `the ports58 atwhich time the edges 60 will cleave .the liquid and discharge it within the-.chamber 57. As the liquid passes through the't'p'oits 58, it will be deflected toward the center of the chamber f57 land de. livered into the eye lof the impeller I under a positive pressure.' It will be observed that liquid passing through the ports 58 from each end of therotor R will be discharged into the chamber'57 inal'converse direction to the motion offtheliquid already within the chamber, thus preventing the liquid en.-

los

tering the chamber from instantly attaining .prdevelopinga centrifugal force until subs stantially reaching the eye ofthe impeller. l The liquid enters the 'eye of the impeller `-ing the necessary lsuction or replacement under a positivev pressure, thereby eliminatfunctions of the usual impeller construction, and thus permitting the impeller to impart compression and centrifugal force alone.

When once the liquid has entered the eye of the impeller, it is taken up by the vanes '16 and 17 and discharged into the outlet 50 where it is passed into a discharge .nozzle 63. The outlet 50 enlarges gradually so as to provide for the continually increasing volume of water discharged from the impeller.

It will be seen that I have provided a device i in ,l )hich the rotor and the impeller are suppor ed by means of the roller bearings, thus reducing to a minimum the resistance between moving parts. Also in equipping my device with expanding rings of the piston type, any wearbetween the rings 42 and the sleeves 40 and 45 is automatically taken up by the expanding rings.

The rotor or impeller unit may be reversed in the housing or base 1 and the cover portion 2, thereby converting the centrifugal pump into a liquid turbine engine capable of receiving energy from liquid under compres- ,sion and transmitting it to the shaft 36.

Suitable pins 64 anchor the rings '42 to the rotor R so that the rings are caused to rotate with the rotor.

I claim:

1. A centrifugal pump comprising a casing having a' central chamber, inlet ports andan outlet port, a rotor having a chamber and a plurality of ports ,and disposed within said central chamber in said casing, sealing means mounted, upon said rotor, sleeves disposed within the central chamber in said casing andl arrangedto bear against sald sealing means,

an impeller secured to'- said rotor, said im- P peller having vanes communicating with the chamber within said rotor, and bearing means for rotatably mounting the'rotor. and said impeller withinl said casing.

2. A centrifugal pump comprising a casing having a central chamber, liquid inlet ports,

land a liquid outlet port, a rotor having a chamber andv a plurality4 of angularly-disposed ports communicating with said liqu1d` inlet ports and said chamber within the rotor,

y an impeller, said impeller being provided with a plurality of vanes arranged to diS- charge the liquid passing through said liquid inlet ports and saidangularly-disposed ports in the rotor and said second named chamber into said liquid outlet port, land. bearing means for rotatably mounting `the rotor and said impeller within the chamber said casing,

3. In a centrifugal pump, a casing a central-chamber, an inlet port and an outity of sleeves mounted within the chamber in said casing and arranged to bear against said sealing rings, an impeller carried by the rotor, Vbearing means arranged for rotatably mounting the rotor and said impeller, and means for enclosingsaid bearing means.

4: A centrifugal pump having ka casing comprising a base portion and a cover portion provided with a central chamber, inlet ports, and an outlet port spirally-disposed with respectto said central chamber, a rotor disposed within said central chamber and having a chamber and a plurality of angularly-disposed ports having concave faces, said angularly-disposed ports communicating with said-inlet-ports and the chamber within said rotor, an impeller carried by the rotor, vanes disposed within the impeller and communicating with the chamber within the rotor and said spirally-disposed outlet port, and bearing means for rotatably mounting the rotor "and an outlet port spirally-disposed with res'pectv to said central chamber, said base portion and saidcover portion being provided with vianges, ymeans passing through said.

flanges for securing the base portion and said cover portion together, a rotor disposed within said central chamber and having a chamber and a plurality of angularly-disposed ports having concave faces, saidvangularlydisposed ports communicating with .said inlet ports and the chamber within said rotor, .an impeller carried by thel rotor, vanes disosed within the impeller and communicating with the chamber within the rotor and said spirally-disposed outlet` ort, bearing means for rotatably mounting the rotor and said impeller within the central chamber in said base4 portion and said cover portion, and means for enclosing said bearing means. p

6. A centrifugal pump comprising a casing having a -chamber and an inlet port and an outlet port, a rotor disposed within said chamber and being provided with a chamber and a plurality of angularly disposed ports having concave faces, -said angularly disposed Aports 2being in communication with said inlet v let port, a rotor having a chamber and a plu! rlity 'of angularl) disposed ports commumcating with said inlet port, a, plurality 9i SeaL 65@ ing rings mounted upon said rotor, a plural- 

